div{
    margin: 10px;
    padding: 20px;
    border: cadetblue 1px solid;
}
.div0{
    /*height: 800px;*/
    /*overflow: auto;*/
    /*overflow: hidden;*/
}
.div0:after{
    content: '';
    display: block;
    clear: both;
}
.div0 div{
    /*默认浮动为none*/
    /*float: none;*/
    float: left;
    display: inline-block;
    /*clear: both;*/
}
.div1{
    border: bisque 1px dashed;
    /*clear: right;*/
}
.div2{
    border: lightcoral 1px dashed;
    /*clear: left;*/
}
.div3{
    border: greenyellow 1px dashed;
    /*clear: both;*/
}
.div4{
    border: hotpink 1px dashed;
    /*clear: right;*/
}